Start Here Start Here Congratulations on your purchase of the NETGEAR™ Model EN308TC Ethernet hub. This hub delivers standards-based, plug-and-play networking solutions for small businesses, home offices, and low-density workgroups of larger companies.
Package Contents Package Contents Model EN308TC hub 100M On = Link Blinking = Activity 10M Normal/Uplink 8 7 BNC 50 terminator and BNC T-connector 6 5 4 3 2 1 50 OHM BNC 100-240 VAC, 50-60Hz 0.2A max.
Product Illustration Product Illustration Front Panel The front panel of the Model EN308TC hub contains LEDs that monitor the activity status of the hub. For ease of use, the front panel 10BASE-T LEDs that indicate link, receive, or partition activity are duplicated on the 10BASE-T ports on the rear panel. Use the rear panel LEDs when setting up the device, and use the same LEDs on the front panel for monitoring the ports when the hub is positioned in place and set up.
Rear Panel The rear panel of the Model EN308TC hub has eight RJ-45 10BASE-T ports, a BNC port that you can use to connect to a backbone network or other PCs using thin coaxial cable, and a Normal/Uplink push button. The rear panel also includes a DC power receptacle. Normal/Uplink push button 100M BNC port 10M On = Link Blinking = Activity Normal/Uplink 8 7 6 5 4 3 2 Power receptacle BNC 1 100-240 VAC, 50-60Hz 0.2A max.
Normal/Uplink Push Button for Port 8 The Normal/Uplink push button allows you to select Normal (MDI-X) wiring for direct PC connection. The push button also allows you to select Uplink (MDI) wiring for connection to another hub or to a switch through port 8 on the Model EN308TC hub. This uplink configuration eliminates the need to use a crossover cable. The other 10BASE-T ports are permanently configured for normal wiring for connection to a PC. Installation Procedures Installation Procedures 1.
3. Connect a PC to the Hub Connect a PC to the Hub You can connect PCs, Apple Macintosh computers, UNIX workstations, or any device equipped with a 10BASE-T Ethernet interface to the RJ-45 ports on your hub by using twisted pair Ethernet cables. To connect any of the RJ-45 ports on your hub to a PC, use a regular straightthrough UTP cable. If you are connecting using port 8 on the Model EN308TC hub, set the Normal/Uplink push button to Normal.
4. Connect the Hub to a Network Connect the Hub to a Network Cascading refers to connecting hubs together to increase the number of ports or the number of users supported on the network. The 10BASE-T ports can be used to cascade hubs together. The twisted pair cable extended from a 10BASE-T port (or UTP port) is called a twisted pair segment and can be up to 100 meters (m) in length. The 10BASE-T ports, with the exception of port 8, are MDI-X (or Normal) ports.
Cascade the Hub Using the 10BASE-T Ports The following illustration shows cascading hubs together in a hierarchical star through the 10BASE-T ports and indicates the setting of the Normal/Uplink push button on each hub. Model EN308TC hub 1 100M Normal 10M On = Link Blinking = Activity BNC Normal/Uplink 8 7 6 5 4 3 2 1 100-240 VAC, 50-60Hz 0.2A max.
Connect to a Network Using the BNC Port The BNC port on the rear panel of the hub is used for connecting to a thin coaxial segment. You can connect other Model EN308TC hubs, servers, workstations, or other devices to the BNC port. A BNC T- connector is inserted in the port, and the BNC 50 Ω terminator terminates the connection at each end device. By using the BNC port for cascading, you treat each connected hub as just another node on the coaxial segment.
5. Verify the Installation Verify the Installation To complete the installation, connect the power cord first to the power receptacle on the hub rear panel and then to the power outlet on the wall. When power has been applied to the hub: • • The green Pwr (Power) LED on the front panel is on. The green Link/Receive LED on each connected port is on. If there are any problems, refer to “Troubleshooting Information.
Troubleshooting Information Troubleshooting Information Symptom Cause Amber Col LED blinks. There is data collision Data collision is normal on Ethernet networks. No on the network. action is required. Amber Col LED blinks excessively. There is data collision on the network because the network is extremely busy or defective devices are connected on the network that cannot detect network traffic or collision. Make sure connected devices are operating in halfduplex mode.
Twisted Pair Cables Twisted Pair Cables Twisted Pair Cables For two devices to communicate, the transmitter of each device must be connected to the receiver of the other device. The crossover function is usually implemented internally as part of the circuitry in the device. Most ports on switches and repeaters have media dependent interfaces with crossover ports. These ports are referred to as MDI-X or Normal ports.
RJ-45 Connector The RJ-45 connector (shown in the illustration with an RJ-45 plug) is used to connect workstations, hubs, and switches through unshielded twisted pair cable. The RJ-45 connector accepts four-pair Category 3 or Category 5 UTP cable. Only two pairs are used for 10BASE-T wiring.
Technical Specifications Technical Specifications General Specifications Network Protocol and Standards Compatibility IEEE 802.3i, 10BASE-T, 10BASE-2, 10BASE-5 Ethernet Data Rate 10 Mbps, Manchester encoded Interface 10BASE-T ports (RJ-45), BNC port Power Consumption 3.5 W Physical Specifications Dimensions: 3.37 by 4.0 by 1.1 in. 94 by 101 by 28 mm Weight: 0.74 lb (0.
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